/** by Just041 **/
*{
	margin: 0;
	padding: 0;
	list-style: none;
	transition: .5s;
}
html,body{
	background-color: #fff;
	font-size: 14px;
}
.app{
	width: 100%;
	height: 100vh;
	position: relative;
	display: flex;
	justify-content: center;
	align-items: center;
}
a{
	text-decoration: none;
	color: green;
	cursor: pointer;
	font-size: 34px;
	font-weight: bold;
}
.a-line{
	width: 0;
	height: 2px;
	display: block;
	margin-bottom: 6px;
	background-color: green;
}
a:hover .a-line{
	width: 100%;
	animation: move .5s ease;
}
@keyframes move{
	from{
		width: 0;
	}
	to{
		width: 100%;
	}
}